[jdk11u-dev] RFR: 8234382: Test tools/javac/processing/model/testgetallmembers/Main.java using too small heap

[Goetz Lindenmaier]

I backport this for parity with 11.0.16-oracle.

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Commit messages:
 - Backport 5cb6271830b61a94e3145dafd44714e8dd882822

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/1052/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=1052&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8234382
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/1052.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/1052/head:pull/1052

PR: https://git.openjdk.java.net/jdk11u-dev/pull/1052